Question

The angle of a prism is 6° and its refractive index for green light is 1.5. If a green ray passes through it, the deviation will be

Answer 1

Angle of Prism (A) = 6°

Refractive Index (R) = 1.5

Let angle of deviation be D

according to formula

R = sin( (A + D)/2) / (sinA/2)

since for small values sinA = A

substituting ,

R = ((A + D)/2)/ (A/2)

1.5 = (6 + D)/6

9 = 6 + D

D = 3°